3 Answers
3

Jomax and bleach worked for me too. The north side of my taupe siding house was nearly solid green. I sprayed the mix on, let it sit for about 8 minutes, then worked it horizontally with a long handled car-washing brush and let it sit a few more minutes and rinsed it off with the hose. It's nearly perfect. I'm going to go over a few sections that were very thick with growth again but from 20 ft you couldn't tell that it wasn't perfect.

One gallon of the mix covered about 10' X 20'

The brush work required a good bit of sweat equity but I think its only required because I let this get so bad. I'll follow up with a post after I clean the sides that are only dirty (no green stuff growing). I think that spray and rinse will do it.

Jomax is good. Make sure the area is dry before using it, or you wasted your money. Use a pump sprayer, start at the bottom and work your way up. Let stand for 5 to 10 minutes. Rinse off with a hose or a pressure washer. If you need to reapply, make sure the surface is dry first.

Wouldn't have believed it if I hadn't seen it. I wish I took before/after pics.

Bought:

Jomax

Clorox Outdoor

Put in a garden sprayer designed for bleach according to instructions on Jomax:

3/4 cups Jomax

2 1/4 cups bleach

13 cups water

For 75% of the siding, I applied the mixture, then rinsed after 5 minutes. A number of sections needed a second application, and the worst section took three.

I rinsed using one of the "fireman" nozzles on my hose, just so I could get it up to the eaves:

I did try just spraying the mildew with the nozzle...worthless. "Firemen" should sue for defamation.

Anyway, I'm thrilled. Probably took 25% longer than last year, but I wasn't dripping wet either :) I'll get a power sprayer for next year, but I'll definitely stick with this; it looks much better than what I get from pressure washing alone.